US 9,810,948 B2
Spatial light modulator comprising a liquid crystal device having reduced stray light
Naru Usukura, Osaka (JP); Hiromi Katoh, Osaka (JP); Yuichi Kanbayashi, Osaka (JP); Norbert Leister, Dresden (DE); and Ralf Haussler, Dresden (DE)
Assigned to SHARP KABUSHIKI KAISHA, Osaka (JP); and SEEREAL TECHNOLOGIES S.A., Munsbach (LU)
Appl. No. 14/425,674
Filed by Naru Usukura, Osaka (JP); Hiromi Katoh, Osaka (JP); Yuichi Kanbayashi, Osaka (JP); Norbert Leister, Dresden (DE); and Ralf Haussler, Dresden (DE)
PCT Filed Sep. 5, 2012, PCT No. PCT/EP2012/067311
§ 371(c)(1), (2), (4) Date Jun. 9, 2015,
PCT Pub. No. WO2014/037036, PCT Pub. Date Mar. 13, 2014.
Prior Publication US 2015/0293409 A1, Oct. 15, 2015
Int. Cl. G02F 1/1337 (2006.01); G02F 1/1347 (2006.01); G02F 1/139 (2006.01); G02F 1/29 (2006.01); G03H 1/22 (2006.01); G02B 27/22 (2006.01); G02F 1/1343 (2006.01)
CPC G02F 1/133753 (2013.01) [G02B 27/2214 (2013.01); G02F 1/1337 (2013.01); G02F 1/1393 (2013.01); G02F 1/13471 (2013.01); G02F 1/292 (2013.01); G03H 1/2205 (2013.01); G03H 1/2294 (2013.01); G02F 1/134309 (2013.01); G02F 2001/13373 (2013.01); G02F 2001/133738 (2013.01); G02F 2001/133742 (2013.01); G02F 2001/133746 (2013.01); G02F 2001/133749 (2013.01); G02F 2001/133761 (2013.01); G02F 2001/133769 (2013.01); G02F 2201/305 (2013.01); G02F 2203/24 (2013.01); G03H 2001/2242 (2013.01); G03H 2223/23 (2013.01); G03H 2225/11 (2013.01); G03H 2225/22 (2013.01)] 13 Claims
OG exemplary drawing
 
1. Controllable diffraction device for a light modulator device in a display for presenting at least one of the following: stereoscopic image contents and stereoscopic multi-view image contents and holographic image contents, the controllable diffraction device comprising
at least two substrates,
at least one electrode on each of said substrates facing each other, and
liquid crystals forming at least one liquid crystal layer arranged between said electrodes on said substrates,
whereby the orientation of the liquid crystals is controllable by a voltage supplied to the electrodes and the liquid crystal layer is provided on at least one alignment layer arranged on at least one electrode on said substrates,
whereby the electrodes are arranged such that an electric field distribution is obtained, which realizes at least regionally a variable saw-tooth-shaped diffractive structure, when voltages are applied to the electrodes, and
whereby the liquid crystals close to the alignment layer are pre-oriented by at least one pre-tilt angle relative to the alignment layer such that the resulting light diffraction in opposite spatial directions caused by the saw-tooth shaped diffractive structure is approximately equal.